| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Brackx, Emmanuelle
CEA Marcoule
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (18/18 displayed)
- 2023Corium materials characterizations through electron microscopy and X-ray diffraction
- 2023Study of the Crystallization in a Glass-Ceramic Sealcitations
- 2023Study of the Crystallization in a Glass-Ceramic Sealcitations
- 2022CORIUM MATERIAL ANALYSIS BY EPMA AND DIFFRACTIONS METHODS
- 2021Chemical interaction between uranium dioxide, boron carbide and stainless steel at 1900 °C — Application to a severe accident scenario in sodium cooled fast reactorscitations
- 2019ANALYTICAL APPROACH TO MATERIALS CHARACTERISATION IN FUTURE NUCLEAR REACTORS (GENERATION IV)
- 2018Study of prototypical corium UZrO from quenching, by a multi-scale approach
- 2017Thermodynamic investigation of the Cr-O-U and Cr-O-Zr systems
- 2017molybdenum behaviour during u-al research reactor spent fuel dissolution
- 2017Quantification of hypo eutectic b-c-fe-o under severe accident condition in nuclear material by epma
- 2016Compaction of porous metal oxide microspheres a multi-scale approach
- 2016Experimental contribution to the corium thermodynamic modelling – The U–Zr–Al–Ca–Si–O systemcitations
- 2016quantification by epma of glass for nuclear application
- 2015Experimental investigation and thermodynamic modelling of the in-vessel corium for severe accident studies in PWR reactors
- 2015Experimental investigation and thermodynamic modelling of the in-vessel corium for severe accident studies in PWR reactors
- 2015Experimental study and thermodynamic modelling of corium mixtures Application to severe accidents in Pressurized Water Reactors
- 2013Analytical approach to usic measurement by electron probe microanalysis
- 2011Quantification of boron by epma in nuclear glass
Places of action
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conferencepaper
CORIUM MATERIAL ANALYSIS BY EPMA AND DIFFRACTIONS METHODS
Abstract
International audience ; In case of severe accident conditions in a nuclear reactor, corium a complex material coming from the melting of the core at a very high temperature (2500-2800 K), will be formed. The cooling process of this material from the liquid state can be rapid in the case of contact with water (from a few milliseconds to a few seconds for the so-called Fuel Coolant Interaction (FCI)), or slow in the case of contact with concrete (from a few minutes to a few hours for the so-called Molten Core Concrete Interaction (MCCI)). Both the solidification mechanism and the structure of the obtained solid state phases are strongly dependent of the cooling process involved during accident progression. Studies were carried out on prototypical corium obtained Fuel Coolant Interaction experiments performed in the KROTOS facility at CEA Cadarache. The fragmented or exploded corium debris under consideration are corresponding to a ternary compound according to the U1-x ZrxO2y solid solution. Powder particles of a typical size of 200 µm or less than 50 µm have been studied to determine their microstructure, elemental composition and structural state. Electron Probe MicroAnalysis (EPMA) was used to determine with high accuracy the local variation of the composition. A specific methodology will be presented and results will be compared with global elemental composition obtained through Rietveld refinement of both X rays and neutrons diffraction patterns.The high-resolution diffraction pattern were recorded at the Mars beamline at the SOLEIL synchrotron while neutrons diffraction experiments were done at the D2B of the Institute Laue Langevin. Moreover, micro texture analyses were performed through SEM/EBSD observations and Laue microdiffraction experiments done on the BM32 beamline at the ESRF synchrotron. We clearly evidenced intra-crystalline local cationic composition variations in a large able to be associated to the different cooling process and the particles sizes.